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  <title>Remove previously set headers</title>

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</div><hr /><div id="function.header-remove" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">header_remove</h1>
  <p class="verinfo">(PHP 5 &gt;= 5.3.0)</p><p class="refpurpose"><span class="refname">header_remove</span> &mdash; <span class="dc-title">Remove previously set headers</span></p>

 </div>

 <div class="refsect1 description" id="refsect1-function.header-remove-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="type"><span class="type void">void</span></span> <span class="methodname"><strong>header_remove</strong></span>
    ([ <span class="methodparam"><span class="type">string</span> <code class="parameter">$name</code></span>
  ] )</div>

  <p class="para rdfs-comment">
   Removes an HTTP header previously set using <span class="function"><a href="function.header.html" class="function">header()</a></span>.
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-function.header-remove-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>

    
     <dt>
<em><code class="parameter">name</code></em></dt>

     <dd>

      <p class="para">
       The header name to be removed.
      </p>
      <blockquote class="note"><p><strong class="note">Note</strong>: 
       <span class="simpara">
        This parameter is case-insensitive.
       </span>
      </p></blockquote>
     </dd>

    
   </dl>

  </p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.header-remove-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   没有返回值。
  </p>
 </div>


 <div class="refsect1 examples" id="refsect1-function.header-remove-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-4389">
    <p><strong>Example #1 Unsetting specific header.</strong></p>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br />header</span><span style="color: #007700">(</span><span style="color: #DD0000">"X-Foo:&nbsp;Bar"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">header</span><span style="color: #007700">(</span><span style="color: #DD0000">"X-Bar:&nbsp;Baz"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">header_remove</span><span style="color: #007700">(</span><span style="color: #DD0000">"X-Foo"</span><span style="color: #007700">);&nbsp;<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
    </div>

    <div class="example-contents"><p>以上例程的输出类似于：</p></div>
    <div class="example-contents screen">
<div class="cdata"><pre>
X-Bar: Baz
</pre></div>
    </div>
   </div>
   <div class="example" id="example-4390">
    <p><strong>Example #2 Unsetting all previously set headers.</strong></p>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br />header</span><span style="color: #007700">(</span><span style="color: #DD0000">"X-Foo:&nbsp;Bar"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">header</span><span style="color: #007700">(</span><span style="color: #DD0000">"X-Bar:&nbsp;Baz"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">header_remove</span><span style="color: #007700">();&nbsp;<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
    </div>

    <div class="example-contents"><p>以上例程的输出类似于：</p></div>
    <div class="example-contents screen">
<div class="cdata"><pre>
</pre></div>
    </div>
   </div>
  </p>
 </div>


 <div class="refsect1 notes" id="refsect1-function.header-remove-notes">
  <h3 class="title">注释</h3>
  <div class="caution"><strong class="caution">Caution</strong>
   <p class="para">
    This function will remove <em class="emphasis">all</em> headers set by PHP,
    including cookies, session and the <em>X-Powered-By</em> headers.
   </p>
  </div>
  <blockquote class="note"><p><strong class="note">Note</strong>: 
<p class="para">
 数据头只会在SAPI支持时得到处理和输出。
</p>
</p></blockquote>

 </div>


 <div class="refsect1 seealso" id="refsect1-function.header-remove-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="function"><a href="function.header.html" class="function" rel="rdfs-seeAlso">header()</a> - Send a raw HTTP header</span></li>
    <li class="member"><span class="function"><a href="function.headers-sent.html" class="function" rel="rdfs-seeAlso">headers_sent()</a> - Checks if or where headers have been sent</span></li>
   </ul>
  </p>
 </div>


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